Gate-type lifting appliance for arch bridge steel grid beam

Abstract

The utility model relates to the technical field of gate-type lifting appliances for arch bridge steel grid beams, and discloses a gate-type lifting appliance for arch bridge steel grid beams, which comprises a connecting component, a rotating component, clamping components and an auxiliary fixing component, the rotating component is mounted below the connecting component, the clamping components are symmetrically distributed and mounted below the clamping components, and the auxiliary fixing component is mounted below the rotating component. The auxiliary fixing assemblies are symmetrically distributed and installed on the inner wall of the clamping assembly. The clamping assembly and the auxiliary fixing assembly are arranged, so that clamping of the steel grid beam in two opposite directions is facilitated, in the lifting process, multi-point contact can be formed between the lifting appliance and the steel grid beam through the clamping mode, the contact area is greatly increased, the clamping force on the steel grid beam can be kept, the risk that the steel grid beam falls off is reduced, and the safety of the lifting appliance is improved. The safety of the hoisting operation is ensured; and the rotating assembly is arranged, so that the hoisting angle can be accurately adjusted according to the actual condition of a construction site when the arch bridge steel grid beam is hoisted.

Description

Technical Field

[0001] This utility model relates to the technical field of gantry lifting devices for steel grating beams of arch bridges, and more specifically to a gantry lifting device for steel grating beams of arch bridges. Background Technology

[0002] A portal frame lifting device for steel lattice beams in arch bridges is mainly used for hoisting horizontal and vertical lattice beams during the construction of steel arch bridges, avoiding collisions with arch ribs and cross braces, and ensuring construction safety. Its working principle is to use a portal structure as support, and to perform the hoisting operation through a triangular hoisting frame on the suspension assembly.

[0003] When lifting steel grating beams, it may be difficult to apply a stable and uniform clamping force simultaneously. This may cause the steel grating beams to sway and shift during the lifting process, making it difficult to accurately place them in the designated position. Positioning and adjusting the steel grating beams becomes difficult, requiring repeated fine-tuning operations. This will greatly extend the installation time of each steel grating beam, resulting in a longer construction cycle for the entire arch bridge. In addition, due to inaccurate positioning and difficulty in adjustment, multiple lifting operations may be required, further reducing construction efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a gantry crane for arch bridge steel grating beams to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a gantry crane for an arch bridge steel grating beam, comprising a connecting assembly, a rotating assembly, a clamping assembly, and an auxiliary fixing assembly. The rotating assembly is installed below the connecting assembly, the clamping assemblies are symmetrically distributed and installed below the clamping assembly, and the auxiliary fixing assemblies are symmetrically distributed and installed on the inner wall of the clamping assembly. The clamping assembly includes a second protective shell, a telescopic motor, an outer shell, a transmission plate, a transmission rod, and a clamp. The second protective shell is fixedly installed at the bottom of the turntable, and a telescopic motor is fixedly installed inside the second protective shell. The output end of the telescopic motor movably passes through the outer shell and is fixedly connected to the transmission plate. The outer shell is fixedly installed on the outer wall of the second protective shell. One end of the transmission rod is movably sleeved with the transmission plate, and the other end of the transmission rod is movably sleeved with the clamp. The clamp is movably sleeved inside the outer shell.

[0006] Preferably, the auxiliary fixing assembly includes a rear baffle, a second fixing rivet, a bidirectional threaded rod, and a clamping plate. The second fixing rivets are symmetrically distributed and are fixedly connected to the inner wall of the clamp through the rear baffle. The bidirectional threaded rod is threaded through the clamping plate and movably passes through the side wall of the rear baffle.

[0007] Preferably, the clamp is provided with a mounting groove for the rear baffle at the connection with the rear baffle, and the clamp is also fixed with a pressure plate that spans the mounting groove and presses the rear baffle into the mounting groove.

[0008] Preferably, the auxiliary fixing assembly further includes an anti-wear pad and a rotating arm, the rotating arm being movably sleeved on one end of the bidirectional threaded rod, and the anti-wear pad being fixedly installed on the inner wall of the clamping plate.

[0009] Preferably, the connecting assembly includes a connecting plate, a connecting groove, a fixing plate, and a first fixing rivet. The connecting plate has symmetrically distributed connecting grooves on both sides, and the first fixing rivet is symmetrically distributed and fixedly penetrates the top of the fixing plate and the connecting plate for fixed connection.

[0010] Preferably, the rotating assembly includes a first protective shell, a fixed rod, and a turntable. The first protective shell is fixedly installed at the bottom of the connecting plate, and a drive motor is fixedly installed inside the first protective shell. The output end of the drive motor is fixedly connected to the top of the turntable.

[0011] Preferably, the rotating assembly further includes a side fixing block, the fixing rods are symmetrically distributed on both sides of the first protective shell, one end of the fixing rod is movably sleeved with the outer wall of the turntable, and the other end of the fixing rod is movably sleeved with the side fixing block. The side fixing block is fixedly installed on the outer wall of the clamping assembly and is symmetrically distributed on both sides of the clamping assembly.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model achieves bidirectional clamping of steel grating beams by setting clamping components and auxiliary fixing components. During hoisting, this clamping method enables multi-point contact between the lifting device and the steel grating beam, significantly increasing the contact area and effectively maintaining the clamping force on the steel grating beam, thereby reducing the risk of the steel grating beam falling off and ensuring the safety of hoisting operations.

[0014] 2. By setting up a rotating component, this utility model allows for flexible adjustment of the hoisting angle when lifting steel grating beams for arch bridges, based on the specific conditions of the construction site, such as the installation position of the steel grating beams and their relative position to other structures, thus achieving precise operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the overall structure and some cross-sectional views of the present invention.

[0017] Figure 3 This is a schematic diagram of the clamping assembly structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the auxiliary fixing component structure of this utility model.

[0019] Reference numerals: 1. Connecting assembly; 101. Connecting plate; 102. Connecting groove; 103. Fixing plate; 104. First fixing rivet; 2. Rotating assembly; 201. First protective shell; 202. Drive motor; 203. Fixing rod; 204. Side fixing block; 205. Turntable; 3. Clamping assembly; 301. Second protective shell; 302. Telescopic motor; 303. Outer shell; 304. Transmission plate; 305. Transmission rod; 306. Clamp; 4. Auxiliary fixing assembly; 401. Rear baffle; 402. Second fixing rivet; 403. Bidirectional threaded rod; 404. Clamping plate; 405. Anti-wear pad; 406. Rotating arm. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The gantry crane for the steel grating beam of the arch bridge involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Reference Figures 1 to 4 As shown, this utility model provides a gantry crane for an arch bridge steel grating beam, including a connecting assembly 1, a rotating assembly 2, a clamping assembly 3, and an auxiliary fixing assembly 4. The rotating assembly 2 is installed below the connecting assembly 1, the clamping assembly 3 is symmetrically distributed and installed below the clamping assembly 3, and the auxiliary fixing assembly 4 is symmetrically distributed and installed on the inner wall of the clamping assembly 3. The clamping assembly 3 includes a second protective shell 301, a telescopic motor 302, an outer shell 303, a transmission plate 304, a transmission rod 305, and a clamp 306. The second protective shell 301 is fixedly installed at the bottom of the turntable 205. The telescopic motor 302 is fixedly installed inside the second protective shell 301. The output end of the telescopic motor 302 movably passes through the outer shell 303 and is fixedly connected to the transmission plate 304. The outer shell 303 is fixedly installed on the outer wall of the second protective shell 301. One end of the transmission rod 305 is movably sleeved with the transmission plate 304, and the other end of the transmission rod 305 is movably sleeved with the clamp 306. The clamp 306 is movably sleeved inside the outer shell 303.

[0022] During use, when it is necessary to hoist the steel grating beams of the arch bridge, the operator first connects the entire lifting device to the hoisting equipment through the connecting component 1 to ensure a stable and reliable connection. Then, by controlling the operation of the rotating component 2, the turntable 205 drives the clamping component 3 below to rotate and adjust so as to align with the position of the steel grating beam of the arch bridge to be hoisted.

[0023] Since the arch bridge steel grating beams are heavy materials, the entire clamping and transportation process involves heavy-load transport. Therefore, the telescopic motor 302 in the clamping assembly 3 starts upon receiving the operation command, and its output end pushes the transmission plate 304 to move. The movement of the transmission plate 304 drives the transmission rod 305, which is movably connected to it, thereby causing the other end of the transmission rod 305 to push the clamp 306 to move inside the outer casing 303. The design of the clamp 306 allows it to tightly clamp the arch bridge steel grating beams, ensuring that they will not slip or shake during hoisting, thus guaranteeing operational safety.

[0024] Meanwhile, the auxiliary fixing component 4 further enhances the fixing effect of the lifting device on the arch bridge steel grating beam, which is very helpful for heavy-load fixing. The auxiliary fixing component 4 is symmetrically distributed on the inner wall of the clamping component 3, and can be adaptively adjusted according to the specific shape and size of the arch bridge steel grating beam, thereby providing more stable support and fixing.

[0025] Combination Figures 1 to 4 As shown, in one of the preferred embodiments of this utility model, the auxiliary fixing component 4 includes a rear baffle 401, a second fixing rivet 402, a bidirectional threaded rod 403, and a clamping plate 404. The second fixing rivets 402 are symmetrically distributed and are fixedly connected to the inner wall of the clamp 306 through the rear baffle 401. The bidirectional threaded rod 403 is threaded through the clamping plate 404 and is movably connected through the side wall of the rear baffle 401.

[0026] By rotating the bidirectional threaded rod 403, the clamping plate 404 can be driven to move between the rear baffle 401 and the clamp 306, thereby clamping both sides of the arch bridge steel grating beam. At the same time, the design of the bidirectional threaded rod 403 makes the adjustment of the clamping plate 404 more flexible, and it can be quickly adjusted according to the width of the arch bridge steel grating beam, thus improving the efficiency of hoisting.

[0027] Furthermore, the rear baffle 401 not only supports the clamping plate 404 but also prevents the arch bridge steel grating beam from sliding backward during hoisting, enhancing the overall safety of the lifting equipment. The second fixing rivet 402, as a connecting component, has a symmetrically distributed design that contributes to the stability of the connection between the rear baffle 401 and the clamping device 306, preventing loosening or detachment due to uneven stress during hoisting.

[0028] Furthermore, the auxiliary fixing component 4 also includes an anti-wear pad 405 and a rotating arm 406. The rotating arm 406 is movably sleeved on one end of the bidirectional threaded rod 403, and the anti-wear pad 405 is fixedly installed on the inner wall of the clamping plate 404.

[0029] The anti-wear shim 405 effectively reduces friction between the clamping plate 404 and the arch bridge steel grating beam, protecting the surface of the arch bridge steel grating beam from damage and extending the service life of the clamping plate 404. The movable sleeve design of the swing arm 406 allows operators to more easily rotate the double-threaded rod 403, further improving the ease of adjustment. In actual operation, operators can rotate the swing arm 406 to drive the double-threaded rod 403 to rotate, thereby adjusting the position of the clamping plate 404 and clamping the arch bridge steel grating beam. This design not only improves work efficiency but also enhances the flexibility and practicality of the lifting equipment.

[0030] Combination Figure 2 and Figure 3 As shown, further, the clamp 306 is provided with a mounting groove for the rear baffle 401 at the connection with the rear baffle 401. The clamp 306 is also fixed with a pressure plate that spans the mounting groove and presses the rear baffle 401 into the mounting groove. This structure helps to ensure that the clamp 306 and the rear baffle 401 fit tightly together. The presence of the mounting groove makes it easy for the clamp 306 itself to fit tightly into the rear baffle 401, while the pressure plate can balance the lever arms on both sides of the mounting groove, which helps to better fix the rear baffle 401.

[0031] Combination Figure 1 and Figure 2 As shown, in one of the preferred embodiments of the present utility model, the connecting component 1 includes a connecting plate 101, a connecting groove 102, a fixing plate 103 and a first fixing rivet 104. The connecting plate 101 has symmetrically distributed connecting grooves 102 on both sides. The first fixing rivet 104 is symmetrically distributed and fixedly penetrates the fixing plate 103 and the top of the connecting plate 101 for fixed connection.

[0032] The design of the connecting groove 102 allows the connecting plate 101 to be more securely connected to other components, enhancing the overall connection strength. The fixing plate 103 is fixedly connected to the top of the connecting plate 101 via the first fixing rivet 104. This structure not only ensures the stability of the connecting assembly 1 but also improves its durability. Furthermore, the symmetrical distribution of the first fixing rivets 104 makes the connection more uniform, further enhancing the reliability and durability of the connection.

[0033] Combination Figure 1 and Figure 2As shown, in one of the preferred embodiments of the present invention, the rotating assembly 2 includes a first protective shell 201, a fixing rod 203 and a turntable 205. The first protective shell 201 is fixedly installed at the bottom of the connecting plate 101. A drive motor 202 is fixedly installed inside the first protective shell 201. The output end of the drive motor 202 is fixedly connected to the top of the turntable 205.

[0034] The turntable 205 is rotatably connected to the top of the fixed rod 203 via a bearing, and the bottom of the fixed rod 203 is fixedly installed on the bottom of the connecting plate 101, enabling the turntable 205 to rotate stably under the drive of the drive motor 202. The presence of the first protective shell 201 not only provides protection for the drive motor 202, but also ensures the structural compactness and stability of the entire rotating assembly 2. As an essential component for bearing and transporting the steel grating beams of the arch bridge, the stable rotation performance of the turntable 205 is also a necessary structural feature for maintaining rotation. Typically, a turntable of common heavy-duty crane specifications or a turntable of similar specifications is used.

[0035] Furthermore, the rotating assembly 2 also includes a side fixing block 204, and fixing rods 203 are symmetrically distributed on both sides of the first protective shell 201. One end of the fixing rod 203 is movably sleeved with the outer wall of the turntable 205, and the other end of the fixing rod 203 is movably sleeved with the side fixing block 204. The side fixing block 204 is fixedly installed on the outer wall of the clamping assembly 3 and is symmetrically distributed on both sides of the clamping assembly 3.

[0036] This design further enhances the stability and load-bearing capacity of the rotating assembly 2. The movable sleeve structure between the fixing rod 203, the turntable 205, and the side fixing block 204 allows the turntable 205 a certain degree of freedom during rotation while maintaining necessary stability. The side fixing block 204 not only serves a fixing function but also helps to disperse the stress that may be generated in the turntable 205 during rotation through its structural characteristics, thereby improving the durability and reliability of the entire rotating assembly 2. In addition, this design makes the connection between the rotating assembly 2 and the clamping assembly 3 tighter and more secure, ensuring that the lifting device can maintain a stable operating state during the transfer of the arch bridge steel grating beam.

[0037] The implementation process of this utility model can be roughly described as follows: At the construction site, construction workers use straps to connect the crane to the connecting groove 102 above the connecting plate 101, fixing the device to the output end of the crane. Then, the construction workers operate the crane to place the material below between the auxiliary fixing component 4 and the clamping component 3. At this time, the output end of the telescopic motor 302 drives the transmission plate 304 to pull up, and the pulling action of the transmission plate 304 drives the symmetrically distributed transmission rods 305 to move upward. The movement of the transmission rods 305 causes the lower movable clamp 306 to retract inward along the bottom groove of the outer shell 303, thereby achieving the clamping effect on the material. Throughout the process, the device has a compact structure, is easy to operate, and greatly improves work efficiency and safety.

[0038] After clamping is completed, the construction personnel rotate the boom 406 according to the material length. The rotation of the boom 406 drives the bidirectional threaded rod 403 to rotate, which further causes the threaded clamping plate 404 to retract inward. During the retraction process, the clamping plate 404 assists in clamping the material, and the anti-wear pads 405 on its inner wall effectively prevent damage to the material surface during clamping. The crane then lifts the material. If the material orientation needs to be adjusted, the output of the drive motor 202 will drive the fixedly installed components below to rotate, thereby adjusting the material orientation. Throughout the lifting process, the use of this arch bridge steel grating beam gantry crane not only improves lifting efficiency but also ensures the safety and stability of the material, effectively avoiding material damage or safety accidents that may occur in traditional lifting methods.

[0039] Finally, it should be noted that, in the description of this application, unless otherwise specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may change. The accompanying drawings of the embodiments disclosed in this utility model only involve structures relevant to the embodiments disclosed in this utility model; other structures can refer to common designs. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. The above descriptions are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gantry crane for an arch bridge steel grating beam, comprising a connecting assembly (1), a rotating assembly (2), a clamping assembly (3), and an auxiliary fixing assembly (4), characterized in that: The rotating assembly (2) is installed below the connecting assembly (1), the clamping assembly (3) is symmetrically distributed and installed below the clamping assembly (3), and the auxiliary fixing assembly (4) is symmetrically distributed and installed on the inner wall of the clamping assembly (3); the clamping assembly (3) includes a second protective shell (301), a telescopic motor (302), an outer shell (303), a transmission plate (304), a transmission rod (305), and a clamp (306). The second protective shell (301) is fixedly installed at the bottom of the turntable (205), and the second protective shell (306) is fixedly installed at the bottom of the turntable (205). A telescopic motor (302) is fixedly installed inside the protective shell (301). The output end of the telescopic motor (302) movably passes through the outer shell (303) and is fixedly connected to the transmission plate (304). The outer shell (303) is fixedly installed on the outer wall of the second protective shell (301). One end of the transmission rod (305) is movably sleeved with the transmission plate (304), and the other end of the transmission rod (305) is movably sleeved with the clamp (306). The clamp (306) is movably sleeved inside the outer shell (303).

2. The gantry crane for the steel grating beam of the arch bridge according to claim 1, characterized in that: The auxiliary fixing component (4) includes a rear baffle (401), a second fixing rivet (402), a bidirectional threaded rod (403), and a clamping plate (404). The second fixing rivet (402) is symmetrically distributed and is fixedly inserted through the rear baffle (401) and fixedly connected to the inner wall of the clamp (306). The bidirectional threaded rod (403) is threaded through the clamping plate (404) and is movably inserted through the side wall of the rear baffle (401).

3. The gantry crane for the steel grating beam of the arch bridge according to claim 2, characterized in that: The auxiliary fixing component (4) also includes an anti-wear pad (405) and a rotating arm (406). The rotating arm (406) is movably sleeved on one end of the bidirectional threaded rod (403), and the anti-wear pad (405) is fixedly installed on the inner wall of the clamp (404).

4. The gantry crane for the steel grating beam of the arch bridge according to claim 2, characterized in that: The clamp (306) is provided with a mounting groove for the rear baffle (401) at the connection with the rear baffle (401), and the clamp (306) is also fixed with a pressure plate that spans the mounting groove and presses the rear baffle (401) into the mounting groove.

5. The gantry crane for the steel lattice beam of the arch bridge according to claim 1, characterized in that: The connecting assembly (1) includes a connecting plate (101), a connecting groove (102), a fixing plate (103), and a first fixing rivet (104). The connecting plate (101) has symmetrically distributed connecting grooves (102) on both sides. The first fixing rivet (104) is symmetrically distributed and fixedly penetrates the fixing plate (103) and the top of the connecting plate (101) for fixed connection.

6. The gantry crane for the steel lattice beam of the arch bridge according to claim 5, characterized in that: The rotating assembly (2) includes a first protective shell (201), a fixing rod (203) and a turntable (205). The first protective shell (201) is fixedly installed at the bottom of the connecting plate (101). A drive motor (202) is fixedly installed inside the first protective shell (201). The output end of the drive motor (202) is fixedly connected to the top of the turntable (205).

7. The gantry crane for the steel grating beam of the arch bridge according to claim 6, characterized in that: The rotating assembly (2) also includes a side fixing block (204). The fixing rod (203) is symmetrically distributed on both sides of the first protective shell (201). One end of the fixing rod (203) is movably connected to the outer wall of the turntable (205), and the other end of the fixing rod (203) is movably connected to the side fixing block (204). The side fixing block (204) is fixedly installed on the outer wall of the clamping assembly (3) and is symmetrically distributed on both sides of the clamping assembly (3).

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